Using negative margins to zoom in on map

Recommended Posts

I am using negative margin values to zoom in on my map. I would like to do the following:

I have a 300 by 400 map. I would like to remove 25% off the right hand side, 20% off the left hand side, 10% off the top, and 5% off the bottom. What should I set the margins to? Can you give me a detailed example of these calculations?